package cn.qicaiwang.open.framework.aspect;

import cn.hutool.core.util.IdUtil;
import cn.hutool.extra.servlet.ServletUtil;
import cn.hutool.extra.spring.SpringUtil;
import com.alibaba.fastjson.JSON;
import cn.qicaiwang.open.common.annotation.Log;
import cn.qicaiwang.open.common.entity.LoginUser;
import cn.qicaiwang.open.common.enums.BusinessStatus;
import cn.qicaiwang.open.common.utils.SecurityUtil;
import cn.qicaiwang.open.common.utils.StringUtils;
import cn.qicaiwang.open.framework.event.SystemOperLogEvent;
import cn.qicaiwang.open.system.model.entity.SystemOperLog;
import com.alibaba.fastjson.serializer.SerializerFeature;
import lombok.extern.slf4j.Slf4j;
import net.dreamlu.mica.ip2region.core.Ip2regionSearcher;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpMethod;
import org.springframework.stereotype.Component;
import org.springframework.validation.BindingResult;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.HandlerMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Collection;
import java.util.Date;
import java.util.Map;
import java.util.Objects;

/**
 * 操作日志记录处理
 */
@Aspect
@Component
@Slf4j
public class LogAspect {
    @Autowired
    private Ip2regionSearcher regionSearcher;

    /**
     * 处理完请求后执行
     *
     * @param joinPoint 切点
     */
    @AfterReturning(pointcut = "@annotation(controllerLog)", returning = "jsonResult")
    public void doAfterReturning(JoinPoint joinPoint, Log controllerLog, Object jsonResult) {
        handleLog(joinPoint, controllerLog, null, jsonResult);
    }

    /**
     * 拦截异常操作
     *
     * @param joinPoint 切点
     * @param e         异常
     */
    @AfterThrowing(value = "@annotation(controllerLog)", throwing = "e")
    public void doAfterThrowing(JoinPoint joinPoint, Log controllerLog, Exception e) {
        handleLog(joinPoint, controllerLog, e, null);
    }

    protected void handleLog(final JoinPoint joinPoint, Log controllerLog, final Exception e, Object jsonResult) {
        HttpServletRequest request = ((ServletRequestAttributes) Objects
                .requireNonNull(RequestContextHolder.getRequestAttributes())).getRequest();
        try {
            // *========数据库日志=========*//
            SystemOperLog operLog = new SystemOperLog();
            operLog.setId(IdUtil.getSnowflakeNextIdStr());
            operLog.setStatus(BusinessStatus.SUCCESS.ordinal());
            // 请求的地址
            String clientIP = ServletUtil.getClientIP(request);
            String address = regionSearcher.getAddress(clientIP);
            operLog.setOperIp(clientIP);
            operLog.setOperLocation(address);

            operLog.setOperUrl(request.getRequestURI());

            // 获取用户信息（兼容后台用户和app用户）
            String username = "app用户"; // 默认值
            try {
                LoginUser loginUser = SecurityUtil.getCurrentUser();
                if (loginUser != null) {
                    username = loginUser.getUsername();
                    operLog.setOperatorType(1); // 后台用户
                } else {
                    operLog.setOperatorType(2); // 手机端用户
                }
            } catch (Exception ex) {
                log.debug("无法获取后台用户信息，使用app用户默认值");
                operLog.setOperatorType(2); // 手机端用户
            }
            operLog.setOperName(username);


            if (e != null) {
                operLog.setStatus(BusinessStatus.FAIL.ordinal());
                operLog.setErrorMsg(StringUtils.substring(e.getMessage(), 0, 2000));
            }

            // 设置方法名称
            String className = joinPoint.getTarget().getClass().getName();
            String methodName = joinPoint.getSignature().getName();
            operLog.setMethod(className + "." + methodName + "()");
            log.info(className + "." + methodName + "()");

            // 设置请求方式
            operLog.setRequestMethod(request.getMethod());
            operLog.setOperTime(new Date());

            // 处理设置注解上的参数
            getControllerMethodDescription(joinPoint, controllerLog, operLog, jsonResult);

            // 保存数据库
            SpringUtil.getApplicationContext().publishEvent(new SystemOperLogEvent(operLog));
        } catch (Exception exp) {
            // 记录本地异常日志
            log.error("==前置通知异常==");
            log.error("异常信息:{}", exp.getMessage());
            exp.printStackTrace();
        }
    }

    /**
     * 获取注解中对方法的描述信息 用于Controller层注解
     *
     * @param log     日志
     * @param operLog 操作日志
     * @throws Exception
     */
    public void getControllerMethodDescription(JoinPoint joinPoint, Log log, SystemOperLog operLog, Object jsonResult) throws Exception {
        // 设置action动作
        operLog.setBusinessType(log.businessType().name());
        // 设置标题
        operLog.setTitle(log.title());
        // 是否需要保存request，参数和值
        if (log.isSaveRequestData()) {
            // 获取参数的信息，传入到数据库中。
            setRequestValue(joinPoint, operLog);
        }
        // 是否需要保存response，参数和值
        if (log.isSaveResponseData() && jsonResult != null) {
            operLog.setJsonResult(StringUtils.substring(JSON.toJSONString(jsonResult, SerializerFeature.PrettyFormat), 0, 2000));
        }
    }

    /**
     * 获取请求的参数，放到log中
     *
     * @param operLog 操作日志
     * @throws Exception 异常
     */
    private void setRequestValue(JoinPoint joinPoint, SystemOperLog operLog) throws Exception {
        HttpServletRequest request = ((ServletRequestAttributes) Objects
                .requireNonNull(RequestContextHolder.getRequestAttributes())).getRequest();
        String requestMethod = operLog.getRequestMethod();
        if (HttpMethod.PUT.name().equals(requestMethod) || HttpMethod.POST.name().equals(requestMethod)) {
            String params = argsArrayToString(joinPoint.getArgs());
            operLog.setOperParam(StringUtils.substring(params, 0, 2000));
        } else {
            // 对于GET请求，获取查询参数
            String queryString = request.getQueryString();
            if (queryString != null && !queryString.isEmpty()) {
                // URL解码处理中文参数
                String decodedParams = java.net.URLDecoder.decode(queryString, "UTF-8");
                log.info("Decoded params: {}", decodedParams);
                operLog.setOperParam(decodedParams != null ? decodedParams : "");  // 避免 null
            } else {
                // 如果没有查询参数，尝试获取路径变量
                Map<?, ?> paramsMap = (Map<?, ?>) request.getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
                operLog.setOperParam(paramsMap != null ? StringUtils.substring(paramsMap.toString(), 0, 2000) : "");
            }
        }
    }

    /**
     * 参数拼装
     */
    private String argsArrayToString(Object[] paramsArray) {
        String params = "";
        if (paramsArray != null && paramsArray.length > 0) {
            for (Object o : paramsArray) {
                if (o != null && !isFilterObject(o)) {
                    try {
                        Object jsonObj = JSON.toJSON(o);
                        params += jsonObj.toString() + " ";
                    } catch (Exception e) {
                    }
                }
            }
        }
        return params.trim();
    }

    /**
     * 判断是否需要过滤的对象。
     *
     * @param o 对象信息。
     * @return 如果是需要过滤的对象，则返回true；否则返回false。
     */
    @SuppressWarnings("rawtypes")
    public boolean isFilterObject(final Object o) {
        Class<?> clazz = o.getClass();
        if (clazz.isArray()) {
            return clazz.getComponentType().isAssignableFrom(MultipartFile.class);
        } else if (Collection.class.isAssignableFrom(clazz)) {
            Collection collection = (Collection) o;
            for (Object value : collection) {
                return value instanceof MultipartFile;
            }
        } else if (Map.class.isAssignableFrom(clazz)) {
            Map map = (Map) o;
            for (Object value : map.entrySet()) {
                Map.Entry entry = (Map.Entry) value;
                return entry.getValue() instanceof MultipartFile;
            }
        }
        return o instanceof MultipartFile || o instanceof HttpServletRequest || o instanceof HttpServletResponse
                || o instanceof BindingResult;
    }
}
